KR200334872Y1 - Bed Plate - Google Patents

Abstract

The present invention relates to a mattress support apparatus, and more particularly to a mattress support apparatus having a structure that can be elevated while supporting the mattress.

The present invention provides a main frame having a square frame shape having a leg supported on the bottom, a fixed plate fixed to the main frame, an upper movable plate unit consisting of a first movable plate and a second movable plate, and a third movable plate and a fourth movable plate. A mattress support apparatus comprising a lower movable plate unit made of a plate, comprising: a fourth movable plate support bracket (202) attached to a lower end of the fourth movable plate (134); A guide hole 204 provided in the fourth movable plate support bracket 202; A support link 206 having one end rotatably coupled to the main frame 100 and the other end having a guide pin 208 guided by the guide hole 204; An auxiliary link connector 216 provided on the support link 206; And one end is rotatably coupled to the auxiliary link connecting portion 216, and the other end is rotatably coupled to the second connecting rod coupling portion 218 provided on the fourth movable plate support bracket 202. It provides a mattress support device comprising a).

Description

Mattress Support Device {Bed Plate}

The present invention relates to a mattress support apparatus, and more particularly to a mattress support apparatus having a structure that can be elevated while supporting the mattress.

The present invention is an improvement of the mattress support apparatus disclosed in Utility Model Registration No. 288282 filed by the applicant of the Utility Model Registration Application filed on June 22, 2002, and a conventional mattress support apparatus is as follows.

Figure 1a is a perspective view of a conventional mattress support device, Figure 1b is a view showing the operating state of the upper movable plate unit of the conventional mattress support device, Figure 1c shows the operating state of the lower movable plate unit of the conventional mattress support device. Drawing.

Conventional mattress support device is movable to the upper and lower sides of the fixing plate 110, the fixing plate 110 is installed in the center of the main frame 100 and the main frame 100 of the rectangular frame shape is provided with legs (102), respectively. The upper movable plate unit 120 and the lower movable plate unit 130 are installed.

The upper movable plate unit 120 includes a first movable plate 122 and a second movable plate 124, and the lower movable plate unit 130 includes a third movable plate 132 and a fourth movable plate 134. Is made of.

Conventional mattress support device by the fixed plate 110 fixed to the center of the main frame 100 and the upper movable plate unit 120 and the lower movable plate unit 130 that can be deflected to the desired height of the upper body and lower body There is an advantage that can be lifted, especially in the case of the upper body has a configuration that can be lifted by dividing the head and back portion by using the second movable plate 124 and the first movable plate 122 to relax the user. There is an advantage that can be provided.

Referring to the operation of the conventional mattress support device with reference to Figures 1b and 1c as follows.

Conventional mattress support device is provided with a drive motor 142 to lift the upper movable plate unit 120 and the lower movable plate unit 130. The upper screw rod 144 and the lower screw rod 172 are operated by the operation of the driving motor 142. The driving motor 142 operates the upper screw rod 144 and the lower screw rod 172 simultaneously. You can either do it or make it work selectively.

First, the operation of the upper movable plate unit 120 will be described.

The upper movable plate unit 120 is operated by the first drive part 140 which consists of the drive motor 142, the upper screw rod 144, and the nut pipe 146 which operates left and right by the upper screw rod 144. do. The lifting operation of the upper movable plate unit 120 is made as the nut pipe 146 moves to the right side of FIG. 1B.

The first drive shaft 150 is hinged to the main frame 100 so that when the interference protrusion 148 attached to the first drive shaft 150 moves to the right by the nut pipe 146, the first drive shaft ( 150 and the first support 152 coupled to the first drive shaft ascend upward.

Meanwhile, one end of the first movable plate 122 is coupled to the main frame 100 by the hinge shaft 168, and the first movable plate 122 and the second movable plate 124 are each attached to a lower portion thereof. The two brackets 156 and the first bracket 158 are connected by the hinge coupling. The first bracket 158 is provided with a long hole 164 and the second bracket 156 is provided with an angle adjusting pin 162, the operating range of the first bracket 158 is limited.

Since the first bracket 158 is hinged to the first support 152 by the first connecting rod 154, when the first support 152 is raised to a predetermined height, the second movable plate 124 is first movable. The plate 122 is fixed at an angle.

Next, the operation of the lower movable plate unit 130 of the conventional mattress support will be described.

As the lower screw rod 172 moves to the left side by the drive motor 142, the nut pipe 174 also moves to the left side, and the nut pipe 174 pushes the interference protrusion 176 to the left side. Accordingly, the second drive shaft 178 having one end hinged to the main frame 100 and the second support 180 coupled to the second drive shaft 178 rotate at a predetermined angle.

On the other hand, one end of the third movable plate 132 is hinged to the main frame by the third hinge portion 188, and the third movable plate 132 and the fourth movable plate 134 are the fourth hinge portion ( Hinged by 190). A third bracket 192 is provided below the fourth movable plate 134, one end of the third bracket 192 is hinged to the link member 184, and the other end is formed by the second connecting table 182. 2 supports 180 and hinge is coupled.

Therefore, when the second support 180 is rotated upward by a predetermined angle, the third movable plate 132 and the fourth movable plate 134 also rise upward by a predetermined height.

On the other hand, the drive motor 142 for operating the upper movable plate unit 120 and the lower movable plate unit 130 may raise or lower the upper movable plate unit 120 and the lower movable plate unit 130 at the same time, It is also possible to selectively operate only one unit.

As described above, the conventional mattress supporter aims at the user's convenience by operating the upper movable plate unit 120 and the lower movable plate unit 130, but has the following problems.

As shown in FIG. 1C, when the fourth movable plate 134 of the conventional mattress support is raised, the fourth movable plate 134 may not be horizontal due to the characteristic of the link structure for raising the fourth movable plate 134. There was a problem that the user can not rest to be inclined in the left direction of 1c.

In addition, conventionally, the upper movable plate unit 120 and the lower movable plate unit 130 are directly coupled to the main frame 100 irrespective of the fixed plate 110, so that there is a problem in that the linkage of each plate is inferior.

In addition, when the third movable plate 132 and the fourth movable plate 134 are elevated in the related art, the angle determined in relation to the third movable plate 132 and the fourth movable plate 134 is configured to operate simultaneously. It can be used only, there was a problem that the deformation of the user's body shape or demand is difficult.

In addition, in the hinge coupling of the movable plate in the related art, the hinge hole is formed in the iron plate and the movable plate or the bracket is rotated so that the problem such as bending of the hinge coupling portion may occur, and there is a risk of a safety accident in use. It was.

Meanwhile, the mattress disclosed in Utility Model Registration No. 290350, filed and registered on June 22, 2002, by the applicant of the Utility Model Registration Application regarding a mattress suitable for use in a conventional mattress support apparatus, is fixed to a conventional mattress support apparatus. A device is needed. In the related art, a Velcro type fixing device, which is also called "sticky tape", was used. However, the Velcro-type fixing device has been inconvenient to pull the fixing string at the time of fixing, so an improvement was required.

In order to solve the above problems, the present invention is to provide a link structure that allows the fourth movable plate in the mattress support device to rise while being horizontal.

In addition, an object of the present invention is to provide a link structure in the mattress support apparatus, which allows the third movable plate and the fourth movable plate to be individually raised or lowered.

In addition, the present invention is to provide an improved shape and structure of the main frame in the mattress support device, and to provide a configuration for fixing the mattress to the mattress support device.

Figure 1a is a perspective view of a conventional mattress support device,

Figure 1b is a view showing the operating state of the upper movable plate unit of the conventional mattress support device,

Figure 1c is a view showing the operating state of the lower movable plate unit of the conventional mattress support device,

Figure 2 is a view showing a link device for driving the lower drive plate unit and the lower movable plate unit in the mattress support apparatus according to a preferred embodiment of the present invention,

3A is a view illustrating a coupling of a fixed plate and a first movable plate or a third movable plate and a combination of a third movable plate and a fourth movable plate in a mattress support apparatus according to a preferred embodiment of the present invention;

Figure 3b is in the mattress support apparatus according to a preferred embodiment of the present invention, the hinge coupling used for the hinge coupling of the fixed plate and the first movable plate or the third movable plate and the hinge coupling of the third movable plate and the fourth movable plate. Drawing showing the configuration,

4 is a view for explaining a configuration for operating the third movable plate and the fourth movable plate separately in the mattress support apparatus according to an embodiment of the present invention,

5 is a view for explaining a configuration for forming each plate in the mattress support apparatus according to a preferred embodiment of the present invention,

6 is a view for explaining the structure of the main frame in the mattress support apparatus according to an embodiment of the present invention,

7 is a view for explaining another structure of the main frame in the mattress support apparatus according to an embodiment of the present invention,

8 is a view for explaining a leg for supporting the main frame in the mattress support apparatus according to an embodiment of the present invention,

9 is a view for explaining the size of the main frame and each plate in the mattress support apparatus according to an embodiment of the present invention,

10 is a view showing a fixing strap and a fixing buckle for fixing a mattress to a mattress support apparatus according to a preferred embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

100: main frame 110: fixed plate

120: upper movable plate unit 130: lower movable plate unit

140: first driving unit 170: second driving unit

202: fourth drive plate support bracket

204: long hole for the guide 206: support link

208: guide plate 210: auxiliary link

301a: outer hinge member 310b: inner hinge member 310b

312: hinge coupling rivet 402: third drive shaft

412: second drive motor 422: rising link

424: drive link 502: plate outer frame

504: internal reinforcement frame 506: frame attachment plate

602a. 602b: fixing plate fixing part 604a, 604b: leg fixing part

802: fixing screw 804: fixing screw coupling member

1000: mattress 1002: fixing buckle

1004: fixing strap

In order to achieve the above object, the present invention, the main frame of the rectangular frame shape having a leg supported on the bottom, the fixed plate fixed to the main frame, the upper movable plate unit and the first movable plate and the second movable plate A mattress supporting device comprising a lower movable plate unit consisting of a third movable plate and a fourth movable plate, comprising: a fourth movable plate support bracket (202) attached to a lower end of the fourth movable plate (134); A guide hole 204 provided in the fourth movable plate support bracket 202; A support link 206 having one end rotatably coupled to the main frame 100 and the other end having a guide pin 208 guided by the guide hole 204; An auxiliary link connector 216 provided on the support link 206; And one end is rotatably coupled to the auxiliary link connecting portion 216, and the other end is rotatably coupled to the second connecting rod coupling portion 218 provided on the fourth movable plate support bracket 202. It provides a mattress support device comprising a).

In addition, the present invention, the main frame of the rectangular frame shape having a leg supported on the bottom, the fixed plate fixed to the main frame, the upper movable plate unit consisting of the first movable plate and the second movable plate and the third movable plate and the third In the mattress support device comprising a lower movable plate unit consisting of four movable plates, the third drive shaft guide 404 provided on the third movable plate 132 and one end guided by the third drive shaft guide 404 The third movable plate is elevated by the third drive shaft 402 having a third drive shaft guide member 406 and rotatably coupled to the main frame 100, and the fourth movable plate 134 is fourth Provided is a mattress support device, which is lifted by a movable plate driving unit.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used as much as possible even if displayed on different drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related known configuration or function may obscure the subject matter of the present invention, the detailed description thereof will be omitted.

Figure 2 is a view showing a link device for driving the lower drive plate unit and the lower movable plate unit in the mattress support apparatus according to a preferred embodiment of the present invention.

The lower movable plate unit 130 is hinged to the fixed plate 110 by the first hinge coupler 212 without directly coupling to the main frame 100. On the other hand, the fixing plate 110 is not shown in Figure 2 is fixed to the main frame. In addition, the third movable plate 132 and the fourth movable plate 134 are hinged by the second hinge coupler 214.

A fourth movable plate support bracket 202 is coupled to the lower end of the fourth movable plate 134. The fourth movable plate support bracket 202 is provided with a guide hole 204 that can guide the guide pin 208 provided at one end of the support link 206. The support link 206 has a guide pin 208 at one end as described above, and the other end of the support link 206 is rotatably coupled to the main frame 100.

On the other hand, the auxiliary link connecting portion 216 is provided near the center of the support link 206, one end of the auxiliary link 210 is coupled to the auxiliary link connecting portion 216 to be rotatable. The other end of the auxiliary link 210 is rotatably coupled to the second connecting rod coupling portion 218 provided in the fourth movable plate support bracket 202.

In addition to the auxiliary link 210, one end of the second connecting rod 182 is rotatably coupled to the second connecting rod coupling portion 218, and the second connecting rod 182 is rotatably coupled to the second support 180.

Referring to the operation of the lower movable plate unit 130 by the above configuration is as follows.

When the second support 180 is lowered, that is, rotated in the left direction of FIG. 2, the second connecting rod is also lowered to lower the fourth movable plate 134. At this time, the auxiliary link 210 coupled to the second connecting rod coupling portion 218 descends itself and pushes the support link 206 coupled to the auxiliary link coupling portion 216 to the left side of FIG. 2. When the support link 206 moves to the left of FIG. 2, the guide pin 206 moves to the left along the guide hole 204.

Therefore, the fourth movable plate 134 supported by the second connecting rod 218 and the support link 206 is lowered while keeping horizontal. Further, when the second support 180 is raised, that is, rotated in the right direction in FIG. 2 to raise the lowered fourth movable plate 134, the guide pin 208 is along the guide hole 204. Since the fourth movable plate 134 is moved to the right side of FIG.

On the other hand, the angle formed with the bottom when the fourth movable plate 134 is raised and lowered is possible by adjusting the length of the auxiliary link 210 or the position of the auxiliary link connecting portion 216. That is, if the length of the auxiliary link 210 is shortened, the fourth movable plate 134 has a higher left portion of FIG. 2 than the right portion of FIG. 2, and vice versa if the length of the auxiliary link 210 is increased. . In addition, when the position of the auxiliary link connecting portion 216 is changed downward from the position where the fourth movable plate 134 becomes horizontal and ascends, the fourth movable plate 134 may have a left portion of FIG. It is higher and vice versa by changing the position of the secondary link connection 216 upwards.

Next, smooth rotation is possible in connection of the fixed plate 110 and the second movable plate 122 or the third movable plate 132 and the connection of the third movable plate 132 and the fourth movable plate 134. The hinge coupling configuration to be described will be described.

Figure 3a is a combination of the fixed plate 110 and the first movable plate 122 or the third movable plate 132 and the third movable plate 132 and the third in the mattress support apparatus according to a preferred embodiment of the present invention 4 is a view showing the coupling of the movable plate 134, Figure 3b is a mattress support apparatus according to a preferred embodiment of the present invention, the fixed plate 110 and the first movable plate 122 or the third movable plate 132 FIG. 3 shows the hinge coupling configuration used for the hinge coupling and the hinge coupling of the third movable plate 132 and the fourth movable plate 134.

Where each of the plates constituting the mattress support device is directly hinged between the plates is the third hinge coupling portion 302, the fixed plate 110 and the third movable between the first movable plate 122 and the fixed plate 110 First hinge coupling 212 between plates 132 and second hinge coupling 214 between third movable plate 132 and fourth movable plate 134. The first movable plate 122 and the second movable plate 124 are coupled by hinge coupling between the first bracket 158 and the second bracket 156 as described in FIG. 1B.

As shown in FIG. 3B, the first hinge coupler 212, the second hinge coupler 214, and the third hinge coupler 302 face the outer hinge member 310a and the inner hinge member 310b. The center space of the outer hinge member 310a and the inner hinge member 310b is coupled to the hinge coupling rivet 312. By doing so, the hinge coupling portions 212, 214, and 302 can be firmly engaged, prevent noise, and improve durability of the coupling portion.

Next, the structure which operates each of the 3rd movable plate 132 and the 4th movable plate 134 separately is demonstrated.

When the height of the fourth movable plate 134 is adjusted as shown in FIG. 1C or FIG. 2, the third movable plate 132 and the fourth movable plate 134 operate in conjunction with each other. It can be used only at the angle, but when driving the third movable plate 132 and the fourth movable plate 134, respectively, as follows, the user can freely adjust the angle and height.

4 is a view for explaining a configuration for operating the third movable plate and the fourth movable plate separately in the mattress support apparatus according to a preferred embodiment of the present invention.

The third movable plate 132 is raised or lowered by the third drive shaft 402. The third drive shaft 402 is rotatably coupled to the main frame 100. In the case of FIG. 4, the third drive shaft 402 is driven by the lower screw rod 172. When the lower screw rod 172 moves to the left side of FIG. 4, the nut pipe 174 pushes the lower portion of the third drive shaft 402 to the left side of FIG. 4. As a result, the third drive shaft 402 rotates in the clockwise direction.

Meanwhile, the third movable plate 132 is provided with a third drive shaft guide 404, and the third drive shaft guide member 406 provided at the end of the third drive shaft 402 is along the third drive shaft guide 404. Guided.

The fourth movable plate 134 is raised or lowered by the second drive motor 412. A fourth bracket 408 and a fifth bracket 418 are attached to the lower portion of the fourth movable plate 134. The second drive motor 412 is rotatably coupled to the fourth bracket 408 by the fourth bracket hinge 410. The second drive motor 412 is coupled to an extension shaft 414 incorporating a screw rod (not shown) which expands and contracts the expansion shaft 416.

One end of the extension shaft 416 is hinged to one end of the drive link 424, the drive link 424 is integrally coupled with the rising link 422 and the fifth bracket (5) by the fifth bracket hinge portion 420 418 hinges.

Meanwhile, one end of the rising link 422 integrally coupled with the driving link 424 is coupled to the guide member 430 moving along the rising link guide 428 provided in the main frame 100. In the implementation of the present invention, the guide member 430 may be a metal bar or the like, but may be in a roller form for smooth guide.

The rising operation of the fourth drive plate 134 will be described as follows.

A dotted line in FIG. 4 represents a state in which the fourth driving plate 134 is in the lowered state. When the extension shaft 416 is extended by operating the second drive motor 412 to rotate the drive link 424 clockwise about the fifth bracket hinge portion 420, the drive link 424 is integrally coupled to the drive link 424. The raised link 422 also rotates clockwise about the fifth bracket hinge portion 420. When the rising link 422 rotates in the clockwise direction, the guide member 430 to which the rising link 422 is coupled moves along the rising link guide 428 to the left side of FIG. 4, so that the rising link 422 is the fourth. The movable plate 134 is raised.

5 is a view for explaining a configuration for forming each plate in the mattress support apparatus according to a preferred embodiment of the present invention.

Each plate (110, 122, 124, 132, 134) of the mattress support device according to the present invention will be changed to various positions as required by the user except the fixing plate 110, so a certain strength and stability should be required. do.

Therefore, in the preferred embodiment of the present invention, each plate (110, 122, 124, 132, 134) is preferably configured as shown in FIG.

Each plate 110, 122, 124, 132, 134 is made of steel or metal alloy material and welds one or more internal reinforcing frames 504 to the inside of an outer frame 502 with a rectangular structure and plate frame 500. One side of the) is made by attaching the frame attachment plate 506.

The frame attachment plate 506 may be composed of one iron plate, a metal alloy plate, an acrylic plate, or the like, but it is preferable to use an iron plate or a metal alloy plate having a plurality of holes in order to ensure strength and reduce the overall weight.

In addition, the plate frame 500 is provided with at least one impact preventing support 508 in order to prevent the impact and noise when each plate (122, 124, 132, 134) comes in contact with the main frame 100 during the ascending and descending. . The anti-shock support 508 preferably has a certain elasticity and strength, preferably made of natural rubber or synthetic rubber.

The structure of the main frame 100 will be described.

6 is a view for explaining the structure of the main frame in the mattress support apparatus according to an embodiment of the present invention.

The main frame 100 has a certain strength because the fixing plate 110 is fixed, and various link devices for operating the movable plates 110, 122, 124, 132, and 134 are coupled and simultaneously support the whole. do.

In constructing the main frame 100, a rectangular frame is formed using a square steel pipe made of steel or metal alloy, and the corner 606 of the main frame 100 is bent roundly so that the user is formed at the corner 606. Don't get hit and hurt.

Meanwhile, fixing plate fixing parts 602a and 602b for fixing the fixing plate 110 are provided at the center in the longitudinal direction of the main frame 100.

In addition, a leg fixing part 604a for fixing the leg 102 is provided below the edge 606 of the main frame 100. Meanwhile, the leg fixing part 604b may be further provided to further attach the leg 102 for supporting the main frame 100 to the central portion of the main frame 100 in the longitudinal direction.

7 is a view for explaining another structure of the main frame in the mattress support apparatus according to a preferred embodiment of the present invention.

The main frame 100 shown in FIG. 7 is configured to connect four square steel pipes made of steel or metal alloy material, and each square steel pipe is coupled to the leg fixing part 604a.

At the position where the respective square steel pipes are coupled, a leg fixing part 604a for fixing the leg 102 is provided, and fixing plate fixing parts 602a and 602b for fixing the fixing plate 110 are provided. On the other hand, the leg fixing portion 604b for attaching the leg 102 may be further provided.

8 is a view for explaining the legs supporting the main frame in the mattress support apparatus according to an embodiment of the present invention.

In the structure for fixing the leg 102 to the leg fixing portions 604a and 604b provided in the main frame 100, the leg 102 is fixed to the leg fixing portions 604a and 604b inside the leg 102. There is provided a fixing screw coupling member 804 to which the fixing screw 802 is coupled.

The fixing screw coupling member 804 forms a female thread that engages with the thread of the fixing screw 802 so that the fixing screw 802 does not fall off.

On the other hand, it is preferable to have a leg support plate 806 in the lower portion of the leg (102). The leg 102 is preferably made of iron or metal alloy material to ensure a constant rigidity, the leg support plate 806 made of synthetic resin or rubber so as not to damage the room or office floor by the lower portion of the leg 102 ).

9 is a view for explaining the size of the main frame and each plate in the mattress support apparatus according to a preferred embodiment of the present invention.

When the movable plates 122, 124, 132, and 134 are moved up and then lowered on the main frame 100, a hand or a foot is moved between the movable plates 122, 124, 132, and 134 and the main frame 100. There is a risk of getting caught. Therefore, in order to reduce the risk, as shown in FIG. 9, the size of the main frame 100 is preferably smaller than the size of each plate 110, 122, 124, 132, 134.

On the other hand, the mattress used in the mattress support device according to the present invention, it should be fixed to the mattress support device in order not to change the position during the up and down operation of the mattress support device.

10 is a view showing a fixing strap and a fixing buckle for fixing a mattress to a mattress support apparatus according to a preferred embodiment of the present invention.

The bottom of the mattress 1000 is provided with a fixing strap 1004 for fixing the mattress 1000 to the mattress support apparatus. A fixing buckle 1002 is provided at the end of the fixing strap 1004. A fixing strap 1004 having a fixing buckle 1002 is provided at a position where the mattress 1000 and the first movable plate 124, the fixing plate 110, and the fourth movable plate 134 are in contact with each other. , Using a fixing buckle 1002 to fix the mattress to the mattress support device.

However, in the preferred embodiment of the present invention, the position provided with the fixing strap 1004 is not limited to the above portion, and the number and position of the fixing strap 1004 can be increased or decreased as necessary.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and variations without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas falling within the scope of the present invention should be interpreted as being included in the scope of the present invention.

As described above, according to the present invention, there is an effect of making the angle of the fourth movable plate horizontal when raising the lower movable plate unit.

In addition, according to the present invention, it is possible to operate the third movable plate and the fourth movable plate individually, so that the user's convenience can be achieved.

In addition, according to the present invention, by improving the structure of the main frame and the legs of the mattress support device to provide safety and convenience of use, there is an effect that the operation of fixing the mattress to the mattress support device becomes easy.

Claims (21)

Square frame-shaped main frame having legs supported on the bottom, fixed plate fixed to the main frame, upper movable plate unit consisting of the first movable plate and the second movable plate and lower portion consisting of the third movable plate and the fourth movable plate A mattress supporting device comprising a movable plate unit, A fourth movable plate support bracket 202 attached to a lower end of the fourth movable plate 134; A guide hole 204 provided in the fourth movable plate support bracket 202; A support link 206 having one end rotatably coupled to the main frame 100 and the other end having a guide pin 208 guided by the guide hole 204; An auxiliary link connector 216 provided on the support link 206; And One end thereof is rotatably coupled to the auxiliary link connecting portion 216, and the other end thereof is rotatably coupled to the second connecting rod coupling portion 218 provided on the fourth movable plate support bracket 202. Mattress support device comprising a. The method of claim 1, The length of the support link 216 is different from the horizontal length of the fourth movable plate 134 when the lifting of the fourth movable plate 134, characterized in that the angle formed with the bottom when the lifting of the fourth movable plate 134 is changed. Mattress Support Device. The method of claim 1, The position of the auxiliary link connecting portion 216 is different from the horizontal position of the fourth movable plate 134 when the elevating of the fourth movable plate 134, characterized in that the angle formed with the floor is changed Mattress support device. The method of claim 2, The position of the auxiliary link connecting portion 216 is different from the horizontal position of the fourth movable plate 134 when the elevating of the fourth movable plate 134, characterized in that the angle formed with the floor is changed Mattress support device. The method according to any one of claims 1 to 4, The first movable plate (122) and the third movable plate (132) is a mattress support device, characterized in that the hinge plate and the coupling. The method of claim 5, First hinge coupler 212 for coupling the fixed plate 110 and the third movable plate 132, and second hinge for coupling the third movable plate 132 and the fourth movable plate 134. Coupling portion 214 and the third hinge coupling portion 216 for coupling the first movable plate 122 and the fixed plate 110, Mattress support device, characterized in that the outer hinge member (310a) and the inner hinge member (310b) abuts, and the outer hinge member (310a) and the inner hinge member (310b) is joined by a hinge coupling rivet (312). The method of claim 5, The fixed plate 110, the first movable plate 122, the second movable plate 124, the third movable plate 132 and the fourth movable plate 134, Mattress support device, characterized in that one or more inner reinforcing frame (504) is welded to the inside of the rectangular outer frame (502) and a frame attachment plate (506) is attached to one surface of the plate frame (500). The method of claim 5, The main frame 100, Plate fixing parts 602a and 602b for fixing the fixing plate 110, rounded bent corners 606, and leg fixing parts provided under the corners 606 for fixing the legs 102. Mattress support device characterized in that. The method of claim 5, The main frame 100, Mattress support device comprising four square steel pipes mutually coupled to each other, and a leg fixing portion for fixing the leg (102) and plate fixing portions (602a, 602b) for fixing the fixing plate (110). The method of claim 5, The leg 102 is, Mattress support device characterized in that it comprises a fixing screw 802 for fixing the leg 102 to the leg fixing portion, a fixing screw coupling member 804 to which the fixing screw 802 is coupled. . The method of claim 10, The leg (102) is a mattress support device, characterized in that it further comprises a leg support (806). Square frame-shaped main frame having legs supported on the bottom, fixed plate fixed to the main frame, upper movable plate unit consisting of the first movable plate and the second movable plate and lower portion consisting of the third movable plate and the fourth movable plate A mattress supporting device comprising a movable plate unit, The third drive shaft guide 404 provided on the third movable plate 132 and one end thereof include a third drive shaft guide member 406 guided by the third drive shaft guide 404 and attached to the main frame 100. The third movable plate is lifted and lowered by the third drive shaft 402 coupled to be rotatable, And the fourth movable plate (134) is lifted by a fourth movable plate driving unit. The method of claim 12, The fourth movable plate drive unit, A fourth bracket 408 attached to a lower portion of the fourth movable plate 134; A fifth bracket 418 attached to a lower portion of the fourth movable plate 134; A second drive motor 412 rotatably coupled to a fourth bracket hinge portion 410 of the fourth bracket 408; An extension shaft 414 which receives a driving force from the second drive motor 412; An extension shaft 416 that is stretched by a screw rod embedded in the extension shaft 414; A drive link 424 hinged to one end of the extension shaft 416; An elevation link 422 integrally coupled to the drive link 424 and hinged to the fifth bracket 418 by a fifth bracket hinge portion 420, one end having a guide member 430; And Lift link guide 428 for guiding the guide member 430 Mattress support device comprising a. The method according to claim 12 or 13, The first movable plate (122) and the third movable plate (132) is a mattress support device, characterized in that the hinge plate and the coupling. The method of claim 14, First hinge coupler 212 for coupling the fixed plate 110 and the third movable plate 132, and second hinge for coupling the third movable plate 132 and the fourth movable plate 134. Coupling portion 214 and the third hinge coupling portion 216 for coupling the first movable plate 122 and the fixed plate 110, Mattress support device, characterized in that the outer hinge member (310a) and the inner hinge member (310b) abuts, and the outer hinge member (310a) and the inner hinge member (310b) is joined by a hinge coupling rivet (312). The method of claim 14, The fixed plate 110, the first movable plate 122, the second movable plate 124, the third movable plate 132 and the fourth movable plate 134, Mattress support device, characterized in that one or more inner reinforcing frame (504) is welded to the inside of the rectangular outer frame (502) and a frame attachment plate (506) is attached to one surface of the plate frame (500). The method of claim 14, The main frame 100, Plate fixing parts 602a and 602b for fixing the fixing plate 110, rounded bent corners 606, and leg fixing parts provided under the corners 606 for fixing the legs 102. Mattress support device characterized in that. The method of claim 14, The main frame 100, Mattress support device comprising four square steel pipes mutually coupled to each other, and a leg fixing portion for fixing the leg (102) and plate fixing portions (602a, 602b) for fixing the fixing plate (110). The method of claim 14, The leg 102 is, Mattress support device characterized in that it comprises a fixing screw 802 for fixing the leg 102 to the leg fixing portion, a fixing screw coupling member 804 to which the fixing screw 802 is coupled. . The method of claim 14, The leg 102 is a mattress support device, characterized in that it further comprises a leg support (806). delete